<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 用户列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!--    展开列    -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' :'','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!--      渲染一级权限        -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--      渲染二级和三级权限        -->
              <el-col :span="19">
                <!--       通过 for 循环 嵌套渲染二级权限         -->
                <el-row
                  :class="[i2 === 0 ? '':'bdtop','vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success"closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
<!--      <pre>{{scope.row}}</pre>      -->
          </template>
        </el-table-column>
        <!--    索引列    -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope" width="300px">
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色的对话框 -->
    <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色的对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
        <el-form-item label="角色名称">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="email">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!--  分配权限的对话框  -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed">
      <!--   树形控件   -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        //  所有角色列表数据
        rolelist: [],
        // 控制添加角色对话框的显示与隐藏
        addDialogVisible: false,
        // 添加角色的表单数据
        addForm: {
          roleName: '',
          roleDesc: ''
        },
        // 添加表单的验证规则对象
        addFormRules: {
          roleName: [{
            required: true,
            message: '请输入角色名称',
            trigger: 'blur'
          }, {
            min: 2,
            max: 5,
            message: '角色名称的长度在2~5个字符之间',
            trigger: 'blur'
          }],
          roleDesc: [{
            message: '请输入角色描述',
            trigger: 'blur'
          }]
        },
        // 控制修改角色对话框的显示与隐藏
        editDialogVisible: false,
        // 查询到的角色信息对象
        editForm:{},
        // 修改表单的验证规则对象
        editFormRules:{
          roleName: [{
            required: true,
            message: '请输入角色名称',
            trigger: 'blur'
          }, {
            min: 2,
            max: 5,
            message: '角色名称的长度在2~5个字符之间',
            trigger: 'blur'
          }],
          roleDesc:[{
            message: '请输入角色描述',
            trigger: 'blur'
          }]
        },
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible: false,
        // 所有权限的数据
        rightslist:[],
        // 树形控件的属性绑定对象
        treeProps:{
          label: 'authName',
          children: 'children'
        },
        // 默认选中的节点Id数组
        defKeys:[],
        // 当前即将分配权限的角色id
        roleId: ''
      }
    },
    created() {
      this.getRoleList()
    },
    methods: {
      async getRoleList() {
        const { data: res } = await this.$http.get('roles')
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败！')
        }
        this.rolelist = res.data
        console.log(res)
      },
      // 监听添加角色对话框的关闭事件
      addDialogClosed() {
        this.$refs.addFormRef.resetFields()
      },
      // 点击按钮，添加新用户
      addRole() {
        this.$refs.addFormRef.validate(async valid => {
          console.log(valid)
          if (!valid) return
          // 可以发起添加用户的网络请求
          const { data: res } = await this.$http.post('roles', this.addForm)

          if (res.meta.status !== 201) {
            this.$message.error('添加角色失败！')
          }

          this.$message.success('添加角色成功！')
          // 隐藏添加用户的对话框
          this.addDialogVisible = false
          // 重新获取用户列表数据
          this.getRoleList()
        })
      },
      // 展示编辑角色的对话框
      async showEditDialog(id){
        // console.log(id)
        const {data:res} = await this.$http.get('roles/' + id)

        if (res.meta.status !== 200){
          return this.$message.error('查询角色信息失败！')
        }

        console.log(this.editForm)
        this.editForm = res.data
        this.editDialogVisible = true
      },
      // 监听修改角色对话框的关闭事件
      editDialogClosed(){
        this.$refs.editFormRef.resetFields()
        this.editForm = []
      },
      // 修改角色信息并提交
      editRoleInfo(){
        this.$refs.editFormRef.validate(async valid=>{
          console.log(valid)
          if (!valid) return
          //  发起修改用户信息的数据请求
          const { data:res } = await this.$http.put('roles/' + this.editForm.roleId,{
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          })

          if (res.meta.status !== 200){
            return this.$message.error('更新角色信息失败！')
          }

          // 关闭对话框
          this.editDialogVisible = false
          // 刷新数据列表
          this.getRoleList()
          // 提示修改成功
          this.$message.success('更新角色信息成功！')
        })
      },
      // 根据Id删除对应的角色信息
      async removeRoleById(id){
        console.log(id)
        //  弹框询问角色是否删除数据
        const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        // 如果角色确认删除，则返回值为字符串 confirm
        // 如果角色取消了删除，则返回值为字符串 cancel
        // console.log(confirmResult)
        if (confirmResult !== 'confirm'){
          return this.$message.info('已取消删除')
        }
        const {data:res} = await this.$http.delete('roles/' +id)

        if (res.meta.status !== 200){
          return this.$message.error('删除角色失败！')
        }
        this.$message.success('删除角色成功！')
        this.getRoleList()
      },
      // 根据Id删除对应的权限
      async removeRightById(role, rightId){
        //  弹框提示用户是否要删除
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)

        if (confirmResult !== 'confirm'){
          return this.$message.info('取消了删除！')
        }

        const {data:res} =await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

        if (res.meta.status !== 200){
          return this.$message.error('删除权限失败')
        }

        // this.getRoleList()
        role.children = res.data
      },
      // 展示分配权限的对话框
      async showSetRightDialog(role){
        this.roleId = role.id
        // 获取所有权限的数据
        const {data:res}  = await this.$http.get('rights/tree')

        if (res.meta.status !== 200){
          return this.$message.error('获取权限数据失败！')
        }

        // 把获取到的权限数据保存到 data 中
        this.rightslist = res.data
        console.log(this.rightslist)

        // 递归获取三级节点的Id
        this.getLeafKeys(role,this.defKeys)

        this.setRightDialogVisible = true
      },
      // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
      getLeafKeys(node, arr){
        // 如果当前 node 节点不包含 chilre n数据，则是三级节点
        if (!node.children){
          return arr.push(node.id)
        }

        node.children.forEach(item => this.getLeafKeys(item, arr))
      },
      // 监听分配权限对话框的关闭事件
      setRightDialogClosed(){
        this.defKeys = []
      },
      // 点击为角色分配权限
      async allotRights(){
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]

        // console.log(keys)
        const idStr = keys.join(',')

        const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{ rids: idStr })

        if (res.meta.status !== 200){
          return this.$message.error('分配权限失败！')
        }

        this.$message.success('分配权限成功！')
        this.getRoleList()
        this.setRightDialogVisible = false
      }
    }
  }
</script>

<style lang="less" scoped>
  .el-tag{
    margin: 7px;
  }

  .bdtop{
    border-top: 1px solid #eee;
  }
  .bdbottom{
    border-bottom: 1px solid #eee;
  }

  .vcenter{
    display: flex;
    align-items: center;
  }
</style>
